Using the slope -intercept form
m=1/2 (-1,2)

Answer:
2 = 1/2(-1) + 2
Step-by-step explanation:
You first substitute the letters for the numbers and then to find (b) or y intercept, you change x to 0 and solve for y. The y intercept is 2
So the equation would be 2 = 1/2(-1) + 2